这是一个良性反馈回路，利用网络效应的力量，创造一个更有用的产品。
It is a virtuous feedback loop, harnessing the power of network effects to create a more useful product.
但是良性竞争的效应对教会学校不起作用——确实一点都不起作用。
But they came across no such benign competitive effects-indeed, they found no effects at all.
这是因为网络效应--用户与应用，用户与用户，开发者与开发者会产生良性互动效应。
This is because of network effects, i.e. a positive feedback loops between users and applications, users and users, and developers and developers.
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